LP3991TL-1.5 Texas Instruments Integrated Circuit (Other) In Stock
LP3991TL-1.5 is a fixed 1.5V ultra-low dropout linear voltage regulator from Texas Instruments. Features 180mV typical dropout voltage, 2V–4V input range, and 35 parametric specs. Ideal for battery-powered applications with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 4
- Lifecycle
- OBSOLETE
- Datasheet
- LP3991TL-1.5 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 1.5V output voltage with tight regulation accuracy
- Ultra-low dropout voltage: 180mV typical, 500mV max at full load
- Wide input voltage range: 2V to 4V, compatible with Li-ion and alkaline batteries
- SOT-23 compatible DSBGA package (R-PBGA-B4) for compact PCB designs
- Low quiescent current for extended battery life in portable devices
Applications
The LP3991TL-1.5 is well suited for battery-powered portable electronics such as smartphones, wearables, and handheld medical devices where a stable 1.5V rail is required with minimal power loss. Its ultra-low dropout of 180mV typical allows efficient operation from nearly depleted Li-ion or alkaline cells. The tiny DSBGA footprint also makes it an excellent choice for space-constrained IoT sensor modules and wireless communication nodes.
Specifications
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.18V |
| Dropout Voltage1-Nom | 0.5V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 4V |
| Input Voltage-Min | 2V |
| JESD-30 Code | R-PBGA-B4 |
| JESD-609 Code | e1 |
| Line Regulation-Max | 0.024% |
| Load Regulation-Max | 0.06% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.3A |
| Output Voltage1-Max | 1.545V |
| Output Voltage1-Min | 1.455V |
| Output Voltage1-Nom | 1.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | BGA4,2X2,20 |
| Package Shape | RECTANGULAR |
| Package Style | GRID ARRAY, VERY THIN PROFILE, FINE PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | TIN SILVER COPPER |
| Terminal Form | BALL |
| Terminal Pitch | 0.5mm |
| Terminal Position | BOTTOM |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Voltage Tolerance-Max | 3% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LP3991TL-1.5:
Frequently Asked Questions
What is the output voltage and dropout voltage of the LP3991TL-1.5?
The LP3991TL-1.5 provides a fixed 1.5V output voltage. Its typical dropout voltage is 180mV and the maximum dropout voltage is 500mV, allowing the device to regulate down to an input voltage very close to the output, making it highly efficient for low-battery applications.
What is the input voltage range supported by the LP3991TL-1.5?
The LP3991TL-1.5 supports an input voltage range of 2V minimum to 4V maximum, with an absolute maximum rating of 6.5V. This range is ideal for single-cell Li-ion batteries (nominally 3.6V–4.2V) as well as two AA alkaline cells in series.
What package does the LP3991TL-1.5 come in, and what applications is it best suited for?
The LP3991TL-1.5 is packaged in a DSBGA-4 (JESD-30 code R-PBGA-B4), an ultra-compact ball-grid-array package. It is best suited for space-constrained portable electronics, wearables, IoT sensors, and handheld medical devices that require a regulated 1.5V supply with low quiescent current and minimal PCB footprint.
Can the LP3991TL-1.5 be used as a replacement for other 1.5V LDO regulators?
Yes, the LP3991TL-1.5 can replace other fixed 1.5V LDO regulators with similar specifications. Verify that the replacement candidate matches on key parameters: input voltage range (2V–4V), dropout voltage (≤500mV), package footprint (DSBGA-4), and output current rating before substitution.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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